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Example
This example shows how to disable RIP automatic route summarization:
B3(su)->router(Config)#router rip
B3(su)->router(Config-router)#no auto-summary
split-horizon poison
Use this command to enable or disable split horizon poison‐reverse mode for RIP packets. The no
form of this command disables split horizon poison reverse.
Syntax
split-horizon poison
no split-horizon poison
Parameters
None.
Defaults
None.
Mode
Router configuration: B3(su)‐>router(Config‐router)#
Usage
Split horizon prevents packets from exiting through the same interface on which they were
received. Poison‐reverse explicitly indicates that a network is unreachable, rather than implying it
by not including the network in routing updates. This function is disabled by default.
Example
This example shows how to disable split horizon poison reverse for RIP packets transmitted on
the VLAN 1 interface:
B3(su)->router(Config)#router rip
B3(su)->Router1(Config-router)#no split-horizon poison
passive-interface
Use this command to prevent RIP from transmitting update packets on an interface. The no form
of this command disables passive interface.
Syntax
passive-interface vlan vlan-id
no passive-interface vlan vlan-id
Parameters
vlan vlan‐id
Specifies the number of the VLAN to make a passive interface. This VLAN
must be configured for IP routing as described in "Pre‐Routing
Configuration Tasks" on page 16‐1.
split-horizon poison
SecureStack B3 Configuration Guide 18-7
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